lineString abstract method

void lineString(Iterable<double> chain, { required Coords type, String? name, Iterable<double>? bounds, })

Writes a line string geometry with a chain of positions.

Use the required type to explicitely specify the type of coordinates.

The chain array contains coordinate values of chain positions as a flat structure. For example for Coords.xyz the first three coordinate values are x, y and z of the first position, the next three coordinate values are x, y and z of the second position, and so on.

Use an optional name to specify a name for a geometry (when applicable).

An optional bounds can used set a minimum bounding box for a geometry written. A writer implementation may use it or ignore it. Supported coordinate value combinations by coordinate type:

Type	Expected values
xy	minX, minY, maxX, maxY
xyz	minX, minY, minZ, maxX, maxY, maxZ
xym	minX, minY, minM, maxX, maxY, maxM
xyzm	minX, minY, minZ, minM, maxX, maxY, maxZ, maxM

An example to write a line string with 3 points and a bounding box:

  content.lineString(
      // points as a flat structure with three (x, y) points
      [
           -1.1, -1.1,
           2.1, -2.5,
           3.5, -3.49,
      ],
      type: Coords.xy,
      bounds: [-1.1, -3.49, 3.5, -1.1],
  );

Implementation

void lineString(
  Iterable<double> chain, {
  required Coords type,
  String? name,
  Iterable<double>? bounds,
});